Ep 12. Pluto Rediscovered

For years, Pluto was considered the ninth planet in our solar system. However, in 2006, it was reclassified as a "dwarf planet." In this episode of Naked Science, titled "Pluto Rediscovered," we explore the history and current understanding of this mysterious celestial body.

The episode begins by examining how Pluto was first discovered in 1930 by astronomer Clyde Tombaugh. Despite its distance from the sun and small size, scientists were convinced that they had discovered the ninth planet. However, as technology improved and more objects were discovered in the outer solar system, Pluto's classification as a planet became increasingly controversial.

The episode delves into the reasons why Pluto's planetary status was challenged. One argument was that, unlike the other eight planets in our solar system, Pluto had not cleared its orbit of other debris. Additionally, its small size and composition placed it in a category with other similar objects in the Kuiper Belt, not with the larger planets.

Despite this controversy, Pluto remains a fascinating object of study for astronomers. The episode explores recent discoveries about Pluto, including the 2015 New Horizons mission to the dwarf planet. This mission provided scientists with the closest-ever images of Pluto's surface, revealing its rugged terrain and icy mountains.

The episode also investigates the chemical makeup of Pluto, which can provide insight into the history of our solar system. Scientists believe that Pluto may be composed of a mixture of rock and ice, with a subsurface ocean of liquid water. This theory is supported by recent observations of nitrogen gas escaping from Pluto's surface, suggesting that the dwarf planet may be geologically active.

The episode concludes by examining the ongoing debate about Pluto's classification as a planet. While some argue that Pluto should continue to be classified as a ninth planet, others believe that it should be reclassified as a member of a new category of dwarf planets. Regardless of its status, Pluto remains a fascinating and mysterious object in our solar system, one that scientists will continue to study and explore in the coming years.

Overall, "Pluto Rediscovered" is a fascinating exploration of one of the most enigmatic objects in our solar system. Through interviews with scientists and stunning visuals of Pluto's surface, the episode provides insight into the history and current understanding of this controversial celestial body. Whether you're a seasoned astronomer or simply interested in the mysteries of the universe, this episode of Naked Science is sure to entertain and inform.